If you have just found that your GSM mobile is locked, you might be racking your brains about what it means and maybe even asking yourself about how you can unlock it on your own. Simply answering, some wireless providers actually do lock their phones so that only the SIMs and memory cards issued by them will work on these phones.
While you might like the phone, you may not like the provider; in such a situation you need to know how to unlock the phone before you can actually change over to another service.
Whilst a traditional cell phone service works by sending calls to a phone, which retains its own unique serial number, a GSM mobile phone is very different. This phone uses a removable memory card or account card which is also known as a SIM card where SIM stands for “subscriber information module”. It is the card which identifies you to the service provider, as it has its own unique serial number.
